They had 4 series up, The Audi TT 15/16 , GTR3 , Formula Raceroom Junior and DTM 92. I would have liked to see multiclass but these sound good for now =D.
Edit: also these make sense cause all of these cars are in the starter pack.

I'm not against raceroom or anything else if SRS still wish to add more SIMS... But similar to iRacing introducing so many series and cars, it tends to disperse drivers ending up in races not going official anymore... As SRS population stands at the moment, I don't know. Just saying. Not entirely shooting things down, but yeah